/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-acceleration/array_2-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:11:24,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:11:24,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:11:24,254 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:11:24,255 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:11:24,257 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:11:24,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:11:24,261 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:11:24,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:11:24,264 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:11:24,265 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:11:24,267 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:11:24,267 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:11:24,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:11:24,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:11:24,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:11:24,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:11:24,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:11:24,276 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:11:24,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:11:24,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:11:24,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:11:24,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:11:24,285 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:11:24,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:11:24,297 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:11:24,297 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:11:24,300 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:11:24,308 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:11:24,309 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:11:24,310 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:11:24,311 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:11:24,312 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:11:24,314 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:11:24,315 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:11:24,315 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:11:24,316 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:11:24,317 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:11:24,317 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:11:24,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:11:24,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:11:24,320 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:11:24,373 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:11:24,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:11:24,377 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:11:24,378 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:11:24,378 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:11:24,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:11:24,379 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:11:24,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:11:24,379 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:11:24,379 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:11:24,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:11:24,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:11:24,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:11:24,381 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:11:24,381 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:11:24,381 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:11:24,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:11:24,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:11:24,382 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:11:24,382 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:11:24,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:11:24,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:11:24,383 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:11:24,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:11:24,383 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:11:24,383 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:11:24,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:11:24,384 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:11:24,384 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:11:24,384 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:11:24,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:11:24,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:11:24,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:11:24,813 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:11:24,813 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:11:24,814 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-2.i [2020-10-27 20:11:24,883 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d7129f428/c192e6018cdd465cb2566a4c2d8fb45b/FLAG5153d8b47 [2020-10-27 20:11:25,431 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:11:25,432 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_2-2.i [2020-10-27 20:11:25,439 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d7129f428/c192e6018cdd465cb2566a4c2d8fb45b/FLAG5153d8b47 [2020-10-27 20:11:25,800 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d7129f428/c192e6018cdd465cb2566a4c2d8fb45b [2020-10-27 20:11:25,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:11:25,812 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:11:25,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:11:25,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:11:25,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:11:25,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:11:25" (1/1) ... [2020-10-27 20:11:25,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f613617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:25, skipping insertion in model container [2020-10-27 20:11:25,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:11:25" (1/1) ... [2020-10-27 20:11:25,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:11:25,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:11:26,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:11:26,108 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:11:26,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:11:26,156 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:11:26,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:26 WrapperNode [2020-10-27 20:11:26,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:11:26,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:11:26,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:11:26,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:11:26,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:26" (1/1) ... [2020-10-27 20:11:26,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:26" (1/1) ... [2020-10-27 20:11:26,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:26" (1/1) ... [2020-10-27 20:11:26,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:26" (1/1) ... [2020-10-27 20:11:26,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:26" (1/1) ... [2020-10-27 20:11:26,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:26" (1/1) ... [2020-10-27 20:11:26,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:26" (1/1) ... [2020-10-27 20:11:26,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:11:26,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:11:26,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:11:26,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:11:26,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:26" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:11:26,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:11:26,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:11:26,311 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:11:26,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:11:26,312 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:11:26,312 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:11:26,312 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:11:26,312 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 20:11:26,312 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 20:11:26,312 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:11:26,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:11:26,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 20:11:26,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:11:26,314 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:11:26,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:11:26,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:11:26,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:11:26,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:11:26,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:11:26,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:11:26,638 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:11:26,638 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 20:11:26,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:11:26 BoogieIcfgContainer [2020-10-27 20:11:26,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:11:26,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:11:26,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:11:26,646 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:11:26,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:11:25" (1/3) ... [2020-10-27 20:11:26,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e5d73e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:11:26, skipping insertion in model container [2020-10-27 20:11:26,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:26" (2/3) ... [2020-10-27 20:11:26,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e5d73e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:11:26, skipping insertion in model container [2020-10-27 20:11:26,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:11:26" (3/3) ... [2020-10-27 20:11:26,650 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-2.i [2020-10-27 20:11:26,662 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:11:26,666 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:11:26,679 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:11:26,707 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:11:26,707 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:11:26,708 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:11:26,708 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:11:26,708 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:11:26,708 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:11:26,708 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:11:26,709 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:11:26,734 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-27 20:11:26,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:11:26,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:26,744 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:26,745 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:26,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:26,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1359145685, now seen corresponding path program 1 times [2020-10-27 20:11:26,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:26,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956664803] [2020-10-27 20:11:26,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:26,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:26,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:26,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:27,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:27,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:11:27,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:27,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-27 20:11:27,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:27,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:27,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:11:27,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:27,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:11:27,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:27,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:27,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:27,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:27,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:27,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 20:11:27,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:27,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:27,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:27,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:27,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:27,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956664803] [2020-10-27 20:11:27,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:11:27,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:11:27,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236065204] [2020-10-27 20:11:27,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:11:27,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:27,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:11:27,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:11:27,303 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-27 20:11:27,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:27,448 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2020-10-27 20:11:27,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:11:27,451 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-27 20:11:27,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:27,459 INFO L225 Difference]: With dead ends: 47 [2020-10-27 20:11:27,460 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 20:11:27,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:11:27,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 20:11:27,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 20:11:27,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 20:11:27,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-27 20:11:27,514 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-10-27 20:11:27,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:27,515 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-27 20:11:27,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:11:27,515 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-27 20:11:27,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:11:27,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:27,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:27,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:11:27,518 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:27,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:27,519 INFO L82 PathProgramCache]: Analyzing trace with hash 671299297, now seen corresponding path program 1 times [2020-10-27 20:11:27,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:27,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249121277] [2020-10-27 20:11:27,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:27,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:27,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:27,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:27,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:11:27,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:27,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-27 20:11:27,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:27,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:11:27,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:11:27,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:11:27,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:27,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:27,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:27,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:27,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:27,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:27,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 20:11:27,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:27,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:27,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:27,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:27,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:11:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:27,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249121277] [2020-10-27 20:11:27,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:11:27,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:11:27,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657210972] [2020-10-27 20:11:27,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:11:27,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:27,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:11:27,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:11:27,848 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 4 states. [2020-10-27 20:11:27,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:27,920 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-27 20:11:27,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:11:27,921 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-27 20:11:27,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:27,922 INFO L225 Difference]: With dead ends: 34 [2020-10-27 20:11:27,922 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 20:11:27,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:11:27,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 20:11:27,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-10-27 20:11:27,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 20:11:27,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-27 20:11:27,931 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2020-10-27 20:11:27,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:27,931 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-27 20:11:27,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:11:27,931 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-27 20:11:27,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 20:11:27,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:27,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:27,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:11:27,933 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:27,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:27,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1983033189, now seen corresponding path program 1 times [2020-10-27 20:11:27,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:27,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341601302] [2020-10-27 20:11:27,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:27,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:27,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:28,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:28,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:11:28,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:28,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-10-27 20:11:28,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:28,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:11:28,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:11:28,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:11:28,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:28,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:28,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:28,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:28,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:28,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:28,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:11:28,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:28,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:28,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:28,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:28,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:11:28,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341601302] [2020-10-27 20:11:28,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:28,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:11:28,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707077953] [2020-10-27 20:11:28,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:11:28,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:28,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:11:28,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:11:28,413 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-10-27 20:11:28,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:28,497 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-10-27 20:11:28,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:11:28,498 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-27 20:11:28,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:28,499 INFO L225 Difference]: With dead ends: 39 [2020-10-27 20:11:28,499 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 20:11:28,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:11:28,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 20:11:28,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-27 20:11:28,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 20:11:28,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-27 20:11:28,508 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2020-10-27 20:11:28,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:28,509 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-27 20:11:28,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:11:28,509 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-27 20:11:28,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:11:28,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:28,510 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:28,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:11:28,511 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:28,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:28,511 INFO L82 PathProgramCache]: Analyzing trace with hash -432056855, now seen corresponding path program 2 times [2020-10-27 20:11:28,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:28,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391328413] [2020-10-27 20:11:28,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:28,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:28,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:29,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:29,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:11:29,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:29,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 523 [2020-10-27 20:11:29,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:29,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:11:29,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:11:29,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:11:29,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:11:29,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:29,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:29,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:29,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:29,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:29,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:29,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:11:29,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:29,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:29,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:29,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:29,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 20:11:29,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391328413] [2020-10-27 20:11:29,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:29,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:11:29,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528920343] [2020-10-27 20:11:29,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:11:29,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:29,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:11:29,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:11:29,161 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 6 states. [2020-10-27 20:11:29,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:29,249 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-10-27 20:11:29,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:11:29,250 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-27 20:11:29,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:29,251 INFO L225 Difference]: With dead ends: 45 [2020-10-27 20:11:29,251 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 20:11:29,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:11:29,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 20:11:29,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-27 20:11:29,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 20:11:29,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-27 20:11:29,259 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 24 [2020-10-27 20:11:29,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:29,259 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-27 20:11:29,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:11:29,259 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-27 20:11:29,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 20:11:29,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:29,260 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:29,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:11:29,261 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:29,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:29,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1490954861, now seen corresponding path program 3 times [2020-10-27 20:11:29,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:29,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193798110] [2020-10-27 20:11:29,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:29,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:29,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:29,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:29,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:29,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:11:29,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:29,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 691 [2020-10-27 20:11:29,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:29,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:11:29,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:11:29,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:11:29,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:30,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:30,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:30,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:30,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:30,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:30,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:11:30,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:30,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:30,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:30,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:30,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 20:11:30,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193798110] [2020-10-27 20:11:30,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:30,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:11:30,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109954705] [2020-10-27 20:11:30,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:11:30,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:30,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:11:30,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:11:30,049 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 7 states. [2020-10-27 20:11:30,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:30,159 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2020-10-27 20:11:30,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:11:30,159 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-27 20:11:30,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:30,161 INFO L225 Difference]: With dead ends: 51 [2020-10-27 20:11:30,161 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 20:11:30,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:11:30,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 20:11:30,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-10-27 20:11:30,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 20:11:30,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-27 20:11:30,168 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2020-10-27 20:11:30,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:30,169 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-27 20:11:30,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:11:30,169 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-27 20:11:30,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:11:30,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:30,170 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:30,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:11:30,171 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:30,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:30,171 INFO L82 PathProgramCache]: Analyzing trace with hash 2101619953, now seen corresponding path program 4 times [2020-10-27 20:11:30,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:30,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795941126] [2020-10-27 20:11:30,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:30,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:30,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:31,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:31,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 20:11:31,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:31,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1304 [2020-10-27 20:11:31,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:31,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:11:31,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 20:11:31,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:11:31,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:31,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:31,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:31,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:31,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:31,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:31,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:11:31,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:31,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:31,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:31,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:31,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:31,587 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 20:11:31,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795941126] [2020-10-27 20:11:31,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:31,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:11:31,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106306216] [2020-10-27 20:11:31,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:11:31,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:31,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:11:31,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:11:31,590 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 8 states. [2020-10-27 20:11:31,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:31,702 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-10-27 20:11:31,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:11:31,703 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-27 20:11:31,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:31,704 INFO L225 Difference]: With dead ends: 57 [2020-10-27 20:11:31,704 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 20:11:31,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:11:31,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 20:11:31,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-10-27 20:11:31,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 20:11:31,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-27 20:11:31,712 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2020-10-27 20:11:31,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:31,712 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-27 20:11:31,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:11:31,712 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-27 20:11:31,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 20:11:31,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:31,714 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:31,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:11:31,714 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:31,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:31,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1361468789, now seen corresponding path program 5 times [2020-10-27 20:11:31,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:31,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731852304] [2020-10-27 20:11:31,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:31,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:31,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:34,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:34,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 20:11:34,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:34,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2353 [2020-10-27 20:11:34,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:34,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:11:34,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 20:11:34,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:11:34,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:34,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:34,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:34,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:34,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:34,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:34,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:11:34,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:34,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:34,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:34,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:34,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 20:11:34,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731852304] [2020-10-27 20:11:34,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:34,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:11:34,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380206178] [2020-10-27 20:11:34,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:11:34,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:34,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:11:34,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:11:34,208 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 9 states. [2020-10-27 20:11:34,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:34,354 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2020-10-27 20:11:34,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:11:34,354 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-27 20:11:34,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:34,355 INFO L225 Difference]: With dead ends: 63 [2020-10-27 20:11:34,355 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 20:11:34,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:11:34,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 20:11:34,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-27 20:11:34,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 20:11:34,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-27 20:11:34,369 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 36 [2020-10-27 20:11:34,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:34,369 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-27 20:11:34,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:11:34,369 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-27 20:11:34,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 20:11:34,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:34,372 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:34,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:11:34,373 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:34,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:34,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1598440455, now seen corresponding path program 6 times [2020-10-27 20:11:34,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:34,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587188373] [2020-10-27 20:11:34,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:34,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:34,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:37,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:37,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 20:11:37,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:37,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3262 [2020-10-27 20:11:37,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:37,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:11:37,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 20:11:37,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:11:37,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:37,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:37,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:37,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:37,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:37,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:37,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:37,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:11:37,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:37,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:37,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:37,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:37,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:11:37,791 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 20:11:37,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587188373] [2020-10-27 20:11:37,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:37,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:11:37,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732092709] [2020-10-27 20:11:37,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:11:37,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:37,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:11:37,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:11:37,796 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 10 states. [2020-10-27 20:11:37,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:37,956 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2020-10-27 20:11:37,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:11:37,957 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-27 20:11:37,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:37,958 INFO L225 Difference]: With dead ends: 69 [2020-10-27 20:11:37,960 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 20:11:37,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:11:37,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 20:11:37,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-27 20:11:37,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 20:11:37,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-27 20:11:37,972 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 40 [2020-10-27 20:11:37,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:37,976 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-27 20:11:37,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:11:37,976 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-27 20:11:37,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 20:11:37,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:37,977 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:37,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:11:37,978 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:37,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:37,979 INFO L82 PathProgramCache]: Analyzing trace with hash -2035070851, now seen corresponding path program 7 times [2020-10-27 20:11:37,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:37,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788109254] [2020-10-27 20:11:37,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:38,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:38,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:43,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:43,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 20:11:43,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:43,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 20:11:43,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:43,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:11:43,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 20:11:43,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:11:43,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:43,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:43,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:43,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:43,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:43,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:43,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:11:43,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:43,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:43,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:43,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:43,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:43,159 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-27 20:11:43,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788109254] [2020-10-27 20:11:43,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:43,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:11:43,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265542237] [2020-10-27 20:11:43,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:11:43,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:43,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:11:43,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:11:43,169 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 11 states. [2020-10-27 20:11:43,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:43,314 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2020-10-27 20:11:43,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:11:43,314 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-27 20:11:43,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:43,315 INFO L225 Difference]: With dead ends: 75 [2020-10-27 20:11:43,315 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 20:11:43,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:11:43,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 20:11:43,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-10-27 20:11:43,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 20:11:43,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-27 20:11:43,326 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2020-10-27 20:11:43,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:43,327 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-27 20:11:43,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:11:43,327 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-27 20:11:43,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 20:11:43,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:43,330 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:43,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:11:43,331 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:43,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:43,331 INFO L82 PathProgramCache]: Analyzing trace with hash -330824959, now seen corresponding path program 8 times [2020-10-27 20:11:43,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:43,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728701162] [2020-10-27 20:11:43,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:43,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:43,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:43,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:48,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:48,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 20:11:48,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:48,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 20:11:48,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:48,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:11:48,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 20:11:48,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:11:48,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:48,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:48,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:48,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:48,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:48,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:48,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:48,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:11:48,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:48,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:48,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:48,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:48,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:48,529 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-27 20:11:48,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728701162] [2020-10-27 20:11:48,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:48,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:11:48,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075067779] [2020-10-27 20:11:48,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:11:48,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:48,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:11:48,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:11:48,532 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 12 states. [2020-10-27 20:11:48,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:48,690 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2020-10-27 20:11:48,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:11:48,690 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-27 20:11:48,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:48,691 INFO L225 Difference]: With dead ends: 81 [2020-10-27 20:11:48,691 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 20:11:48,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:11:48,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 20:11:48,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2020-10-27 20:11:48,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 20:11:48,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-27 20:11:48,705 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 48 [2020-10-27 20:11:48,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:48,705 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-27 20:11:48,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:11:48,705 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-27 20:11:48,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 20:11:48,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:48,708 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:48,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:11:48,708 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:48,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:48,708 INFO L82 PathProgramCache]: Analyzing trace with hash 153938821, now seen corresponding path program 9 times [2020-10-27 20:11:48,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:48,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582867144] [2020-10-27 20:11:48,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:48,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:48,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:53,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:53,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 20:11:53,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:53,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 20:11:53,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:53,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:11:53,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 20:11:53,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:11:53,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:53,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:53,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:53,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:53,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:53,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:53,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:11:53,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:53,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:53,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:53,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:53,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:11:53,961 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-27 20:11:53,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582867144] [2020-10-27 20:11:53,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:53,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:11:53,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994920787] [2020-10-27 20:11:53,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:11:53,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:53,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:11:53,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:11:53,965 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 13 states. [2020-10-27 20:11:54,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:54,166 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2020-10-27 20:11:54,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:11:54,167 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-27 20:11:54,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:54,168 INFO L225 Difference]: With dead ends: 87 [2020-10-27 20:11:54,168 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 20:11:54,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:11:54,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 20:11:54,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2020-10-27 20:11:54,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 20:11:54,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-27 20:11:54,182 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2020-10-27 20:11:54,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:54,183 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-27 20:11:54,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:11:54,183 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-27 20:11:54,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 20:11:54,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:54,184 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:54,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:11:54,186 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:54,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:54,186 INFO L82 PathProgramCache]: Analyzing trace with hash -476642807, now seen corresponding path program 10 times [2020-10-27 20:11:54,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:54,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835019094] [2020-10-27 20:11:54,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:54,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:54,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:59,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:59,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 20:11:59,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:59,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 20:11:59,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:59,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:11:59,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 20:11:59,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 20:11:59,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:59,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:59,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:59,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:59,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:59,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:59,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:11:59,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:59,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:59,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:59,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:59,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-27 20:11:59,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835019094] [2020-10-27 20:11:59,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:59,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:11:59,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087613497] [2020-10-27 20:11:59,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:11:59,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:59,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:11:59,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:11:59,485 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 14 states. [2020-10-27 20:11:59,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:59,662 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2020-10-27 20:11:59,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:11:59,662 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-27 20:11:59,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:59,663 INFO L225 Difference]: With dead ends: 93 [2020-10-27 20:11:59,664 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 20:11:59,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:11:59,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 20:11:59,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-10-27 20:11:59,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 20:11:59,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-27 20:11:59,681 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 56 [2020-10-27 20:11:59,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:59,681 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-27 20:11:59,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:11:59,682 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-27 20:11:59,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 20:11:59,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:59,685 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:59,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:11:59,686 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:59,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:59,686 INFO L82 PathProgramCache]: Analyzing trace with hash -801421683, now seen corresponding path program 11 times [2020-10-27 20:11:59,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:59,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375527551] [2020-10-27 20:11:59,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:59,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:59,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:04,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:04,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 20:12:04,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:12:04,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 20:12:04,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:04,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:12:04,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 20:12:04,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:12:04,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:12:04,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:04,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:04,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:04,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:04,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:04,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:04,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:04,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:04,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:04,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:04,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:04,958 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-27 20:12:04,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375527551] [2020-10-27 20:12:04,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:04,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:12:04,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666396007] [2020-10-27 20:12:04,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:12:04,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:04,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:12:04,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:12:04,960 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 15 states. [2020-10-27 20:12:05,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:05,103 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2020-10-27 20:12:05,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:12:05,104 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2020-10-27 20:12:05,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:05,105 INFO L225 Difference]: With dead ends: 99 [2020-10-27 20:12:05,105 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 20:12:05,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:12:05,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 20:12:05,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-10-27 20:12:05,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 20:12:05,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-27 20:12:05,121 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 60 [2020-10-27 20:12:05,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:05,121 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-27 20:12:05,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:12:05,122 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-27 20:12:05,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 20:12:05,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:05,125 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:05,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:12:05,127 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:05,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:05,127 INFO L82 PathProgramCache]: Analyzing trace with hash -229721839, now seen corresponding path program 12 times [2020-10-27 20:12:05,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:05,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302463246] [2020-10-27 20:12:05,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:05,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:05,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:10,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:10,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 20:12:10,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:12:10,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 20:12:10,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:10,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:12:10,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 20:12:10,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 20:12:10,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:10,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:10,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:10,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:10,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:10,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:10,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:10,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:12:10,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:10,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:10,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:10,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:10,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-27 20:12:10,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302463246] [2020-10-27 20:12:10,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:10,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:12:10,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698064827] [2020-10-27 20:12:10,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:12:10,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:10,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:12:10,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:12:10,387 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 16 states. [2020-10-27 20:12:10,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:10,593 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2020-10-27 20:12:10,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:12:10,594 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2020-10-27 20:12:10,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:10,594 INFO L225 Difference]: With dead ends: 105 [2020-10-27 20:12:10,595 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 20:12:10,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:12:10,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 20:12:10,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2020-10-27 20:12:10,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 20:12:10,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-10-27 20:12:10,602 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 64 [2020-10-27 20:12:10,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:10,603 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-10-27 20:12:10,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:12:10,603 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-10-27 20:12:10,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 20:12:10,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:10,604 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:10,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:12:10,604 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:10,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:10,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1148823147, now seen corresponding path program 13 times [2020-10-27 20:12:10,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:10,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043647676] [2020-10-27 20:12:10,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:10,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:10,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:15,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:15,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 20:12:15,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:12:15,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-27 20:12:15,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:15,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:12:15,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 20:12:15,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 20:12:15,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:15,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:15,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:15,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:15,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:15,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:15,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:15,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:15,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:15,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:15,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:15,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:15,899 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-27 20:12:15,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043647676] [2020-10-27 20:12:15,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:15,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:12:15,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17608067] [2020-10-27 20:12:15,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:12:15,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:15,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:12:15,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:12:15,902 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 17 states. [2020-10-27 20:12:16,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:16,114 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2020-10-27 20:12:16,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:12:16,114 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-10-27 20:12:16,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:16,115 INFO L225 Difference]: With dead ends: 111 [2020-10-27 20:12:16,115 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 20:12:16,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:12:16,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 20:12:16,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-10-27 20:12:16,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 20:12:16,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-10-27 20:12:16,129 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 68 [2020-10-27 20:12:16,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:16,130 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-10-27 20:12:16,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:12:16,130 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-10-27 20:12:16,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 20:12:16,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:16,131 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:16,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:12:16,131 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:16,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:16,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1813456921, now seen corresponding path program 14 times [2020-10-27 20:12:16,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:16,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068624056] [2020-10-27 20:12:16,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:16,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:16,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:21,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:21,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 20:12:21,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:12:21,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5086 [2020-10-27 20:12:21,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:21,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:12:21,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 20:12:21,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:12:21,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:21,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:21,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:21,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:21,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:21,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:21,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:21,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:12:21,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:21,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:21,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:21,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:21,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-27 20:12:21,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068624056] [2020-10-27 20:12:21,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:21,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:12:21,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847466658] [2020-10-27 20:12:21,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:12:21,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:21,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:12:21,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:12:21,561 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 18 states. [2020-10-27 20:12:21,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:21,876 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2020-10-27 20:12:21,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:12:21,879 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 72 [2020-10-27 20:12:21,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:21,880 INFO L225 Difference]: With dead ends: 117 [2020-10-27 20:12:21,880 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 20:12:21,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:12:21,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 20:12:21,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2020-10-27 20:12:21,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 20:12:21,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-27 20:12:21,895 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 72 [2020-10-27 20:12:21,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:21,896 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-27 20:12:21,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:12:21,896 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-27 20:12:21,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 20:12:21,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:21,900 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:21,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:12:21,900 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:21,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:21,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1833556835, now seen corresponding path program 15 times [2020-10-27 20:12:21,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:21,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895076234] [2020-10-27 20:12:21,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:21,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:22,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:26,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:26,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 20:12:26,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:12:26,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 20:12:26,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:26,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:12:26,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 20:12:26,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 20:12:26,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:27,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:27,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:27,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:27,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:27,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:27,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:12:27,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:27,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:27,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:27,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:27,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-27 20:12:27,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895076234] [2020-10-27 20:12:27,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:27,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:12:27,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378534089] [2020-10-27 20:12:27,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:12:27,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:27,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:12:27,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:12:27,312 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 19 states. [2020-10-27 20:12:27,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:27,582 INFO L93 Difference]: Finished difference Result 123 states and 126 transitions. [2020-10-27 20:12:27,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:12:27,582 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 76 [2020-10-27 20:12:27,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:27,583 INFO L225 Difference]: With dead ends: 123 [2020-10-27 20:12:27,583 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 20:12:27,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:12:27,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 20:12:27,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2020-10-27 20:12:27,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 20:12:27,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-10-27 20:12:27,595 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 76 [2020-10-27 20:12:27,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:27,595 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-10-27 20:12:27,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:12:27,595 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-10-27 20:12:27,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 20:12:27,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:27,596 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:27,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:12:27,597 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:27,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:27,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1936175327, now seen corresponding path program 16 times [2020-10-27 20:12:27,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:27,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56424266] [2020-10-27 20:12:27,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:27,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:27,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:32,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:32,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 20:12:32,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:12:32,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-27 20:12:32,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:32,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:12:32,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 20:12:32,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 20:12:32,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:32,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:32,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:32,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:32,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:32,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:32,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:32,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:32,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:32,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:32,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:32,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-27 20:12:32,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56424266] [2020-10-27 20:12:32,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:32,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:12:32,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594735549] [2020-10-27 20:12:32,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:12:32,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:32,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:12:32,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:12:32,995 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 20 states. [2020-10-27 20:12:33,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:33,244 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2020-10-27 20:12:33,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:12:33,245 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 80 [2020-10-27 20:12:33,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:33,246 INFO L225 Difference]: With dead ends: 129 [2020-10-27 20:12:33,246 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 20:12:33,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:12:33,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 20:12:33,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2020-10-27 20:12:33,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 20:12:33,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-10-27 20:12:33,254 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 80 [2020-10-27 20:12:33,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:33,255 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-10-27 20:12:33,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:12:33,255 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-10-27 20:12:33,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 20:12:33,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:33,256 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:33,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:12:33,257 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:33,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:33,257 INFO L82 PathProgramCache]: Analyzing trace with hash 91400101, now seen corresponding path program 17 times [2020-10-27 20:12:33,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:33,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531881668] [2020-10-27 20:12:33,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:33,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:33,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:38,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:38,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 20:12:38,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:12:38,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-27 20:12:38,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:38,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:12:38,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 20:12:38,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 20:12:38,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:38,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:38,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:38,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:38,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:38,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:38,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:38,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:38,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:38,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:38,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:38,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:38,670 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-27 20:12:38,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531881668] [2020-10-27 20:12:38,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:38,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:12:38,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83418429] [2020-10-27 20:12:38,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:12:38,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:38,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:12:38,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:12:38,672 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 21 states. [2020-10-27 20:12:38,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:38,949 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2020-10-27 20:12:38,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:12:38,950 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 84 [2020-10-27 20:12:38,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:38,951 INFO L225 Difference]: With dead ends: 135 [2020-10-27 20:12:38,951 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 20:12:38,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:12:38,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 20:12:38,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2020-10-27 20:12:38,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 20:12:38,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-10-27 20:12:38,957 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2020-10-27 20:12:38,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:38,957 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-10-27 20:12:38,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:12:38,958 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-10-27 20:12:38,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 20:12:38,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:38,958 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:38,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:12:38,959 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:38,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:38,959 INFO L82 PathProgramCache]: Analyzing trace with hash 2004495913, now seen corresponding path program 18 times [2020-10-27 20:12:38,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:38,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724772588] [2020-10-27 20:12:38,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:38,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:38,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:39,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:44,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:44,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 20:12:44,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:12:44,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-27 20:12:44,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:44,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:12:44,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-27 20:12:44,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 20:12:44,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:44,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:44,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:44,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:44,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:44,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:44,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:44,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:12:44,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:44,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:44,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:44,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:44,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-27 20:12:44,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724772588] [2020-10-27 20:12:44,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:44,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:12:44,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196739506] [2020-10-27 20:12:44,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:12:44,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:44,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:12:44,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:12:44,406 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 22 states. [2020-10-27 20:12:44,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:44,690 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2020-10-27 20:12:44,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:12:44,690 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 88 [2020-10-27 20:12:44,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:44,692 INFO L225 Difference]: With dead ends: 141 [2020-10-27 20:12:44,693 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 20:12:44,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:12:44,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 20:12:44,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2020-10-27 20:12:44,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 20:12:44,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-10-27 20:12:44,706 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 88 [2020-10-27 20:12:44,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:44,707 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-10-27 20:12:44,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:12:44,707 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-10-27 20:12:44,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 20:12:44,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:44,709 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:44,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:12:44,709 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:44,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:44,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1419517267, now seen corresponding path program 19 times [2020-10-27 20:12:44,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:44,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227211014] [2020-10-27 20:12:44,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:44,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:44,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:44,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:49,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:49,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 20:12:49,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:12:49,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-27 20:12:49,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:49,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:12:49,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-27 20:12:49,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 20:12:49,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:50,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:50,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:50,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:50,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:50,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:50,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:50,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:50,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:50,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:50,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:50,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-27 20:12:50,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227211014] [2020-10-27 20:12:50,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:50,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:12:50,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977766599] [2020-10-27 20:12:50,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:12:50,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:50,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:12:50,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:12:50,176 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 23 states. [2020-10-27 20:12:50,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:50,488 INFO L93 Difference]: Finished difference Result 147 states and 150 transitions. [2020-10-27 20:12:50,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:12:50,488 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 92 [2020-10-27 20:12:50,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:50,490 INFO L225 Difference]: With dead ends: 147 [2020-10-27 20:12:50,490 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 20:12:50,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:12:50,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 20:12:50,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2020-10-27 20:12:50,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 20:12:50,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-10-27 20:12:50,496 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 92 [2020-10-27 20:12:50,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:50,496 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-10-27 20:12:50,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:12:50,496 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-10-27 20:12:50,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 20:12:50,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:50,497 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:50,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:12:50,498 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:50,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:50,498 INFO L82 PathProgramCache]: Analyzing trace with hash 946128177, now seen corresponding path program 20 times [2020-10-27 20:12:50,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:50,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589686198] [2020-10-27 20:12:50,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:50,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:50,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:55,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:55,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 20:12:55,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:12:55,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-27 20:12:55,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:55,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:12:55,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 20:12:55,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 20:12:55,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:55,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:55,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:55,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:55,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:55,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:55,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:12:55,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:55,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:55,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:55,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:55,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:55,974 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-27 20:12:55,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589686198] [2020-10-27 20:12:55,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:55,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:12:55,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859065050] [2020-10-27 20:12:55,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:12:55,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:55,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:12:55,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:12:55,976 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 24 states. [2020-10-27 20:12:56,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:56,225 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2020-10-27 20:12:56,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 20:12:56,229 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 96 [2020-10-27 20:12:56,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:56,229 INFO L225 Difference]: With dead ends: 153 [2020-10-27 20:12:56,230 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 20:12:56,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:12:56,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 20:12:56,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2020-10-27 20:12:56,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 20:12:56,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2020-10-27 20:12:56,236 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 96 [2020-10-27 20:12:56,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:56,236 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2020-10-27 20:12:56,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:12:56,237 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2020-10-27 20:12:56,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-27 20:12:56,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:56,238 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:56,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:12:56,238 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:56,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:56,238 INFO L82 PathProgramCache]: Analyzing trace with hash 70374837, now seen corresponding path program 21 times [2020-10-27 20:12:56,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:56,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560462808] [2020-10-27 20:12:56,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:56,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:56,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:01,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:01,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 20:13:01,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:01,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-27 20:13:01,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:01,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:13:01,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-27 20:13:01,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 20:13:01,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:01,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:01,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:01,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:01,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:01,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:01,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:01,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:13:01,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:01,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:01,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:01,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:01,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-27 20:13:01,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560462808] [2020-10-27 20:13:01,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:01,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:13:01,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100193079] [2020-10-27 20:13:01,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:13:01,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:01,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:13:01,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:13:01,790 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 25 states. [2020-10-27 20:13:02,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:02,118 INFO L93 Difference]: Finished difference Result 159 states and 162 transitions. [2020-10-27 20:13:02,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:13:02,120 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 100 [2020-10-27 20:13:02,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:02,121 INFO L225 Difference]: With dead ends: 159 [2020-10-27 20:13:02,121 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 20:13:02,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:13:02,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 20:13:02,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2020-10-27 20:13:02,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 20:13:02,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2020-10-27 20:13:02,129 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2020-10-27 20:13:02,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:02,130 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2020-10-27 20:13:02,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:13:02,131 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2020-10-27 20:13:02,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 20:13:02,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:02,133 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:02,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:13:02,133 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:02,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:02,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1023404999, now seen corresponding path program 22 times [2020-10-27 20:13:02,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:02,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212918320] [2020-10-27 20:13:02,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:02,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:02,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:07,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:07,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 20:13:07,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:07,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-27 20:13:07,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:07,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:13:07,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-27 20:13:07,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 20:13:07,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:07,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:07,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:07,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:07,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:07,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:07,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:07,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:13:07,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:07,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:07,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:07,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:07,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:07,674 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-27 20:13:07,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212918320] [2020-10-27 20:13:07,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:07,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:13:07,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613188190] [2020-10-27 20:13:07,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:13:07,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:07,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:13:07,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:13:07,676 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 26 states. [2020-10-27 20:13:07,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:07,962 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2020-10-27 20:13:07,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:13:07,962 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 104 [2020-10-27 20:13:07,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:07,963 INFO L225 Difference]: With dead ends: 165 [2020-10-27 20:13:07,964 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 20:13:07,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:13:07,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 20:13:07,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2020-10-27 20:13:07,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 20:13:07,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2020-10-27 20:13:07,978 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2020-10-27 20:13:07,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:07,978 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2020-10-27 20:13:07,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 20:13:07,978 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2020-10-27 20:13:07,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 20:13:07,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:07,979 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:07,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:13:07,980 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:07,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:07,983 INFO L82 PathProgramCache]: Analyzing trace with hash 2005172413, now seen corresponding path program 23 times [2020-10-27 20:13:07,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:07,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806669711] [2020-10-27 20:13:07,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:08,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:08,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:13,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:13,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 20:13:13,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:13,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-27 20:13:13,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:13,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 20:13:13,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-27 20:13:13,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 20:13:13,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:13,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:13,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:13,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:13,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:13,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:13,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:13,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:13:13,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:13,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:13,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:13,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:13,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-27 20:13:13,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806669711] [2020-10-27 20:13:13,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:13,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 20:13:13,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903599540] [2020-10-27 20:13:13,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 20:13:13,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:13,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 20:13:13,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:13:13,549 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 27 states. [2020-10-27 20:13:13,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:13,849 INFO L93 Difference]: Finished difference Result 171 states and 174 transitions. [2020-10-27 20:13:13,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:13:13,850 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 108 [2020-10-27 20:13:13,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:13,851 INFO L225 Difference]: With dead ends: 171 [2020-10-27 20:13:13,852 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 20:13:13,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:13:13,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 20:13:13,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2020-10-27 20:13:13,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-27 20:13:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2020-10-27 20:13:13,859 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 108 [2020-10-27 20:13:13,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:13,859 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2020-10-27 20:13:13,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 20:13:13,859 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2020-10-27 20:13:13,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-27 20:13:13,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:13,860 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:13,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 20:13:13,861 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:13,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:13,861 INFO L82 PathProgramCache]: Analyzing trace with hash -218883263, now seen corresponding path program 24 times [2020-10-27 20:13:13,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:13,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481702481] [2020-10-27 20:13:13,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:13,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:17,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:18,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:18,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 20:13:18,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:18,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 20:13:18,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:18,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:13:18,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 20:13:18,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 20:13:18,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:19,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:19,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:19,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:19,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:19,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:19,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:19,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:19,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:19,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:19,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:19,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:19,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-27 20:13:19,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481702481] [2020-10-27 20:13:19,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:19,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 20:13:19,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610602574] [2020-10-27 20:13:19,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 20:13:19,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:19,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 20:13:19,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:13:19,476 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 28 states. [2020-10-27 20:13:19,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:19,798 INFO L93 Difference]: Finished difference Result 177 states and 180 transitions. [2020-10-27 20:13:19,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:13:19,800 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2020-10-27 20:13:19,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:19,801 INFO L225 Difference]: With dead ends: 177 [2020-10-27 20:13:19,801 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 20:13:19,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:13:19,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 20:13:19,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2020-10-27 20:13:19,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 20:13:19,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-10-27 20:13:19,810 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 112 [2020-10-27 20:13:19,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:19,810 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-10-27 20:13:19,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 20:13:19,811 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-10-27 20:13:19,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-27 20:13:19,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:19,812 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:19,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 20:13:19,812 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:19,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:19,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1426318277, now seen corresponding path program 25 times [2020-10-27 20:13:19,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:19,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643223017] [2020-10-27 20:13:19,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:19,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:19,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:24,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:24,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-27 20:13:24,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:24,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5108 [2020-10-27 20:13:24,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:24,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 20:13:24,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-27 20:13:24,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 20:13:24,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:25,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:25,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:25,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:25,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:25,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:25,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:25,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:25,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:25,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:25,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:25,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:25,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-27 20:13:25,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643223017] [2020-10-27 20:13:25,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:25,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 20:13:25,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551320208] [2020-10-27 20:13:25,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 20:13:25,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:25,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 20:13:25,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:13:25,535 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 29 states. [2020-10-27 20:13:25,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:25,909 INFO L93 Difference]: Finished difference Result 183 states and 186 transitions. [2020-10-27 20:13:25,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:13:25,909 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 116 [2020-10-27 20:13:25,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:25,911 INFO L225 Difference]: With dead ends: 183 [2020-10-27 20:13:25,911 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 20:13:25,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:13:25,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 20:13:25,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2020-10-27 20:13:25,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 20:13:25,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2020-10-27 20:13:25,920 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 116 [2020-10-27 20:13:25,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:25,920 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2020-10-27 20:13:25,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 20:13:25,921 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2020-10-27 20:13:25,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-27 20:13:25,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:25,921 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:25,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 20:13:25,921 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:25,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:25,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1947674039, now seen corresponding path program 26 times [2020-10-27 20:13:25,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:25,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993828598] [2020-10-27 20:13:25,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:25,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:26,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:31,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:31,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 20:13:31,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:31,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5156 [2020-10-27 20:13:31,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:31,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 20:13:31,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-27 20:13:31,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 20:13:31,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:31,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:31,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:31,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:31,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:31,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:31,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:13:31,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:31,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:31,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:31,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:31,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:31,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-27 20:13:31,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993828598] [2020-10-27 20:13:31,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:31,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 20:13:31,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096572916] [2020-10-27 20:13:31,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 20:13:31,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:31,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 20:13:31,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:13:31,731 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 30 states. [2020-10-27 20:13:32,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:32,088 INFO L93 Difference]: Finished difference Result 189 states and 192 transitions. [2020-10-27 20:13:32,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 20:13:32,089 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 120 [2020-10-27 20:13:32,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:32,090 INFO L225 Difference]: With dead ends: 189 [2020-10-27 20:13:32,090 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 20:13:32,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:13:32,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 20:13:32,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2020-10-27 20:13:32,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-27 20:13:32,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2020-10-27 20:13:32,097 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 120 [2020-10-27 20:13:32,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:32,097 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2020-10-27 20:13:32,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 20:13:32,097 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2020-10-27 20:13:32,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-27 20:13:32,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:32,098 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:32,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 20:13:32,098 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:32,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:32,099 INFO L82 PathProgramCache]: Analyzing trace with hash -732430643, now seen corresponding path program 27 times [2020-10-27 20:13:32,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:32,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751789771] [2020-10-27 20:13:32,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:32,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:32,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:37,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:37,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-27 20:13:37,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:37,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 20:13:37,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:37,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 20:13:37,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:37,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 20:13:37,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:37,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:37,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:37,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:37,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:37,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:37,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:37,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:37,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:37,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:37,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:37,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:37,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-27 20:13:37,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751789771] [2020-10-27 20:13:37,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:37,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 20:13:37,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920014058] [2020-10-27 20:13:37,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 20:13:37,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:37,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 20:13:37,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:13:37,821 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 31 states. [2020-10-27 20:13:38,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:38,189 INFO L93 Difference]: Finished difference Result 195 states and 198 transitions. [2020-10-27 20:13:38,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:13:38,189 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 124 [2020-10-27 20:13:38,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:38,191 INFO L225 Difference]: With dead ends: 195 [2020-10-27 20:13:38,191 INFO L226 Difference]: Without dead ends: 131 [2020-10-27 20:13:38,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:13:38,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-27 20:13:38,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2020-10-27 20:13:38,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 20:13:38,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2020-10-27 20:13:38,198 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2020-10-27 20:13:38,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:38,198 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2020-10-27 20:13:38,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 20:13:38,198 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2020-10-27 20:13:38,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-27 20:13:38,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:38,199 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:38,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 20:13:38,200 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:38,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:38,200 INFO L82 PathProgramCache]: Analyzing trace with hash 965103953, now seen corresponding path program 28 times [2020-10-27 20:13:38,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:38,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338917962] [2020-10-27 20:13:38,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:38,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:43,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:43,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-27 20:13:43,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:43,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-10-27 20:13:43,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:43,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 20:13:43,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:43,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 20:13:43,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:43,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:43,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:43,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:43,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:43,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:43,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:43,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:43,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:43,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:43,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:43,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-27 20:13:43,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338917962] [2020-10-27 20:13:43,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:43,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 20:13:43,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629192256] [2020-10-27 20:13:43,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 20:13:43,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:43,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 20:13:43,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:13:43,987 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 32 states. [2020-10-27 20:13:44,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:44,424 INFO L93 Difference]: Finished difference Result 201 states and 204 transitions. [2020-10-27 20:13:44,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 20:13:44,425 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 128 [2020-10-27 20:13:44,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:44,427 INFO L225 Difference]: With dead ends: 201 [2020-10-27 20:13:44,427 INFO L226 Difference]: Without dead ends: 135 [2020-10-27 20:13:44,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:13:44,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-27 20:13:44,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2020-10-27 20:13:44,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 20:13:44,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2020-10-27 20:13:44,434 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 128 [2020-10-27 20:13:44,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:44,435 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2020-10-27 20:13:44,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 20:13:44,435 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2020-10-27 20:13:44,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-27 20:13:44,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:44,436 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:44,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 20:13:44,436 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:44,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:44,437 INFO L82 PathProgramCache]: Analyzing trace with hash 354996693, now seen corresponding path program 29 times [2020-10-27 20:13:44,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:44,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605394502] [2020-10-27 20:13:44,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:44,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:49,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:49,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-27 20:13:49,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:49,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5105 [2020-10-27 20:13:49,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:49,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 20:13:49,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:49,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 20:13:49,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:50,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:50,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:50,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:50,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:50,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:50,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:13:50,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:50,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:50,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:50,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:50,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-27 20:13:50,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605394502] [2020-10-27 20:13:50,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:50,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 20:13:50,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024864302] [2020-10-27 20:13:50,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 20:13:50,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:50,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 20:13:50,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:13:50,377 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 33 states. [2020-10-27 20:13:50,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:50,827 INFO L93 Difference]: Finished difference Result 207 states and 210 transitions. [2020-10-27 20:13:50,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 20:13:50,828 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 132 [2020-10-27 20:13:50,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:50,830 INFO L225 Difference]: With dead ends: 207 [2020-10-27 20:13:50,830 INFO L226 Difference]: Without dead ends: 139 [2020-10-27 20:13:50,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:13:50,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-27 20:13:50,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-10-27 20:13:50,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-27 20:13:50,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2020-10-27 20:13:50,846 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 132 [2020-10-27 20:13:50,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:50,846 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2020-10-27 20:13:50,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 20:13:50,847 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2020-10-27 20:13:50,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-27 20:13:50,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:50,850 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:50,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 20:13:50,850 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:50,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:50,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1888190375, now seen corresponding path program 30 times [2020-10-27 20:13:50,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:50,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070477380] [2020-10-27 20:13:50,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:50,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:56,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:56,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-27 20:13:56,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:56,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5222 [2020-10-27 20:13:56,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:56,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 20:13:56,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:56,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 20:13:56,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:56,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:56,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:56,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:56,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:56,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:56,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:13:56,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:56,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:56,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:56,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:56,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:13:56,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-27 20:13:56,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070477380] [2020-10-27 20:13:56,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:56,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 20:13:56,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360602663] [2020-10-27 20:13:56,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 20:13:56,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:56,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 20:13:56,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:13:56,896 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 34 states. [2020-10-27 20:13:57,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:57,354 INFO L93 Difference]: Finished difference Result 213 states and 216 transitions. [2020-10-27 20:13:57,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 20:13:57,355 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 136 [2020-10-27 20:13:57,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:57,356 INFO L225 Difference]: With dead ends: 213 [2020-10-27 20:13:57,356 INFO L226 Difference]: Without dead ends: 143 [2020-10-27 20:13:57,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:13:57,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-27 20:13:57,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2020-10-27 20:13:57,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-27 20:13:57,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2020-10-27 20:13:57,364 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 136 [2020-10-27 20:13:57,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:57,364 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2020-10-27 20:13:57,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 20:13:57,364 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2020-10-27 20:13:57,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-27 20:13:57,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:57,365 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:57,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 20:13:57,366 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:57,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:57,366 INFO L82 PathProgramCache]: Analyzing trace with hash 522083549, now seen corresponding path program 31 times [2020-10-27 20:13:57,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:57,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401563446] [2020-10-27 20:13:57,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:57,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:02,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:02,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-27 20:14:02,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:02,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5241 [2020-10-27 20:14:02,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:02,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 20:14:02,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:02,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 20:14:02,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:03,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:03,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:03,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:03,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:03,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:03,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:14:03,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:03,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:03,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:03,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:03,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-10-27 20:14:03,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401563446] [2020-10-27 20:14:03,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:03,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 20:14:03,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384963232] [2020-10-27 20:14:03,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 20:14:03,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:03,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 20:14:03,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:14:03,489 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 35 states. [2020-10-27 20:14:03,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:03,976 INFO L93 Difference]: Finished difference Result 219 states and 222 transitions. [2020-10-27 20:14:03,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 20:14:03,976 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 140 [2020-10-27 20:14:03,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:03,978 INFO L225 Difference]: With dead ends: 219 [2020-10-27 20:14:03,978 INFO L226 Difference]: Without dead ends: 147 [2020-10-27 20:14:03,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:14:03,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-27 20:14:03,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2020-10-27 20:14:03,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-27 20:14:03,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2020-10-27 20:14:03,986 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 140 [2020-10-27 20:14:03,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:03,986 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2020-10-27 20:14:03,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 20:14:03,986 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2020-10-27 20:14:03,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-27 20:14:03,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:03,987 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:03,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 20:14:03,987 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:03,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:03,988 INFO L82 PathProgramCache]: Analyzing trace with hash 156985185, now seen corresponding path program 32 times [2020-10-27 20:14:03,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:03,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619651698] [2020-10-27 20:14:03,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:04,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:09,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:09,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-27 20:14:09,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:09,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5110 [2020-10-27 20:14:09,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:09,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 20:14:09,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:09,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 20:14:09,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:09,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:09,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:09,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:09,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:09,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:09,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:14:09,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:09,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:09,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:09,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:09,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-27 20:14:10,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619651698] [2020-10-27 20:14:10,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:10,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 20:14:10,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613470326] [2020-10-27 20:14:10,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 20:14:10,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:10,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 20:14:10,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:14:10,007 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 36 states. [2020-10-27 20:14:10,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:10,510 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2020-10-27 20:14:10,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 20:14:10,510 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 144 [2020-10-27 20:14:10,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:10,512 INFO L225 Difference]: With dead ends: 225 [2020-10-27 20:14:10,512 INFO L226 Difference]: Without dead ends: 151 [2020-10-27 20:14:10,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:14:10,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-27 20:14:10,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2020-10-27 20:14:10,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-27 20:14:10,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2020-10-27 20:14:10,520 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 144 [2020-10-27 20:14:10,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:10,521 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2020-10-27 20:14:10,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 20:14:10,521 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2020-10-27 20:14:10,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-27 20:14:10,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:10,522 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:10,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 20:14:10,522 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:10,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:10,523 INFO L82 PathProgramCache]: Analyzing trace with hash -505372699, now seen corresponding path program 33 times [2020-10-27 20:14:10,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:10,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828197857] [2020-10-27 20:14:10,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:10,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:10,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:15,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:15,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-27 20:14:15,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:15,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5177 [2020-10-27 20:14:15,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:15,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 20:14:15,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:15,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 20:14:15,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:16,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:16,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:16,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:16,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:16,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:16,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:16,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:16,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:16,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:16,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:16,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:16,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-10-27 20:14:16,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828197857] [2020-10-27 20:14:16,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:16,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 20:14:16,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14593668] [2020-10-27 20:14:16,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 20:14:16,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:16,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 20:14:16,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:14:16,692 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 37 states. [2020-10-27 20:14:17,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:17,081 INFO L93 Difference]: Finished difference Result 231 states and 234 transitions. [2020-10-27 20:14:17,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 20:14:17,082 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 148 [2020-10-27 20:14:17,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:17,083 INFO L225 Difference]: With dead ends: 231 [2020-10-27 20:14:17,083 INFO L226 Difference]: Without dead ends: 155 [2020-10-27 20:14:17,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:14:17,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-27 20:14:17,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2020-10-27 20:14:17,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-27 20:14:17,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2020-10-27 20:14:17,090 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 148 [2020-10-27 20:14:17,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:17,091 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2020-10-27 20:14:17,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 20:14:17,091 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2020-10-27 20:14:17,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-27 20:14:17,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:17,092 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:17,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 20:14:17,092 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:17,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:17,092 INFO L82 PathProgramCache]: Analyzing trace with hash 182650473, now seen corresponding path program 34 times [2020-10-27 20:14:17,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:17,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811894751] [2020-10-27 20:14:17,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:17,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:22,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:22,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-27 20:14:22,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:22,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5095 [2020-10-27 20:14:22,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:22,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 20:14:22,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:22,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 20:14:22,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:23,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:23,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:23,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:23,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:23,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:23,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:14:23,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:23,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:23,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:23,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:23,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-10-27 20:14:23,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811894751] [2020-10-27 20:14:23,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:23,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 20:14:23,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138392825] [2020-10-27 20:14:23,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 20:14:23,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:23,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 20:14:23,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 20:14:23,247 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 38 states. [2020-10-27 20:14:23,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:23,761 INFO L93 Difference]: Finished difference Result 237 states and 240 transitions. [2020-10-27 20:14:23,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 20:14:23,762 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 152 [2020-10-27 20:14:23,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:23,763 INFO L225 Difference]: With dead ends: 237 [2020-10-27 20:14:23,763 INFO L226 Difference]: Without dead ends: 159 [2020-10-27 20:14:23,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 20:14:23,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-27 20:14:23,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2020-10-27 20:14:23,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-27 20:14:23,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2020-10-27 20:14:23,771 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 152 [2020-10-27 20:14:23,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:23,772 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2020-10-27 20:14:23,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 20:14:23,772 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2020-10-27 20:14:23,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-27 20:14:23,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:23,773 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:23,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 20:14:23,773 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:23,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:23,773 INFO L82 PathProgramCache]: Analyzing trace with hash 890739437, now seen corresponding path program 35 times [2020-10-27 20:14:23,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:23,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903003332] [2020-10-27 20:14:23,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:23,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:29,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:29,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-27 20:14:29,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:29,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5197 [2020-10-27 20:14:29,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:29,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 20:14:29,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:29,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 20:14:29,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:30,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:30,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:30,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:30,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:30,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:30,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:14:30,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:30,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:30,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:30,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:30,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:30,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2020-10-27 20:14:30,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903003332] [2020-10-27 20:14:30,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:30,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 20:14:30,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885684040] [2020-10-27 20:14:30,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 20:14:30,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:30,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 20:14:30,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:14:30,025 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 39 states. [2020-10-27 20:14:30,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:30,557 INFO L93 Difference]: Finished difference Result 243 states and 246 transitions. [2020-10-27 20:14:30,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 20:14:30,562 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 156 [2020-10-27 20:14:30,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:30,563 INFO L225 Difference]: With dead ends: 243 [2020-10-27 20:14:30,563 INFO L226 Difference]: Without dead ends: 163 [2020-10-27 20:14:30,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:14:30,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-27 20:14:30,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2020-10-27 20:14:30,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-27 20:14:30,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2020-10-27 20:14:30,571 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 156 [2020-10-27 20:14:30,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:30,571 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2020-10-27 20:14:30,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 20:14:30,571 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2020-10-27 20:14:30,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-27 20:14:30,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:30,573 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:30,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 20:14:30,573 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:30,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:30,573 INFO L82 PathProgramCache]: Analyzing trace with hash -541893263, now seen corresponding path program 36 times [2020-10-27 20:14:30,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:30,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940944528] [2020-10-27 20:14:30,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:30,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:35,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:35,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-27 20:14:35,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:35,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5310 [2020-10-27 20:14:35,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:35,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 20:14:35,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:35,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 20:14:35,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:36,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:36,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:36,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:36,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:36,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:36,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:36,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:14:36,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:36,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:36,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:36,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:36,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2020-10-27 20:14:36,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940944528] [2020-10-27 20:14:36,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:36,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 20:14:36,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316791496] [2020-10-27 20:14:36,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 20:14:36,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:36,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 20:14:36,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 20:14:36,979 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 40 states. [2020-10-27 20:14:37,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:37,542 INFO L93 Difference]: Finished difference Result 249 states and 252 transitions. [2020-10-27 20:14:37,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 20:14:37,542 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 160 [2020-10-27 20:14:37,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:37,543 INFO L225 Difference]: With dead ends: 249 [2020-10-27 20:14:37,544 INFO L226 Difference]: Without dead ends: 167 [2020-10-27 20:14:37,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 20:14:37,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-27 20:14:37,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2020-10-27 20:14:37,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-27 20:14:37,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2020-10-27 20:14:37,550 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 160 [2020-10-27 20:14:37,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:37,551 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2020-10-27 20:14:37,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 20:14:37,551 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2020-10-27 20:14:37,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-27 20:14:37,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:37,552 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:37,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 20:14:37,552 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:37,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:37,553 INFO L82 PathProgramCache]: Analyzing trace with hash -664056331, now seen corresponding path program 37 times [2020-10-27 20:14:37,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:37,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600904846] [2020-10-27 20:14:37,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:37,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:42,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:42,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-27 20:14:42,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:42,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5219 [2020-10-27 20:14:42,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:42,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 20:14:42,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:42,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 20:14:42,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:43,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:43,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:43,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:43,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:43,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:43,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:14:43,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:43,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:43,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:43,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:43,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2020-10-27 20:14:43,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600904846] [2020-10-27 20:14:43,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:43,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 20:14:43,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593633252] [2020-10-27 20:14:43,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 20:14:43,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:43,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 20:14:43,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:14:43,968 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 41 states. [2020-10-27 20:14:44,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:44,430 INFO L93 Difference]: Finished difference Result 255 states and 258 transitions. [2020-10-27 20:14:44,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 20:14:44,431 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 164 [2020-10-27 20:14:44,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:44,433 INFO L225 Difference]: With dead ends: 255 [2020-10-27 20:14:44,433 INFO L226 Difference]: Without dead ends: 171 [2020-10-27 20:14:44,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:14:44,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-27 20:14:44,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2020-10-27 20:14:44,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-27 20:14:44,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2020-10-27 20:14:44,440 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2020-10-27 20:14:44,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:44,441 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2020-10-27 20:14:44,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 20:14:44,441 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2020-10-27 20:14:44,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-27 20:14:44,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:44,442 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:44,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 20:14:44,442 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:44,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:44,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1149997959, now seen corresponding path program 38 times [2020-10-27 20:14:44,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:44,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761270116] [2020-10-27 20:14:44,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:44,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:49,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:49,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-27 20:14:49,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:49,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5105 [2020-10-27 20:14:49,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:49,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 20:14:49,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:49,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 20:14:49,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:50,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:50,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:50,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:50,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:50,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:50,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:50,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:50,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:50,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:50,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:50,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:50,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2020-10-27 20:14:50,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761270116] [2020-10-27 20:14:50,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:50,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 20:14:50,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591725440] [2020-10-27 20:14:50,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 20:14:50,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:50,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 20:14:50,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 20:14:50,727 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 42 states. [2020-10-27 20:14:51,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:51,317 INFO L93 Difference]: Finished difference Result 261 states and 264 transitions. [2020-10-27 20:14:51,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 20:14:51,318 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 168 [2020-10-27 20:14:51,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:51,319 INFO L225 Difference]: With dead ends: 261 [2020-10-27 20:14:51,319 INFO L226 Difference]: Without dead ends: 175 [2020-10-27 20:14:51,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 20:14:51,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-27 20:14:51,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2020-10-27 20:14:51,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-27 20:14:51,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2020-10-27 20:14:51,327 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 168 [2020-10-27 20:14:51,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:51,327 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2020-10-27 20:14:51,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 20:14:51,328 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2020-10-27 20:14:51,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-27 20:14:51,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:51,329 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:51,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 20:14:51,329 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:51,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:51,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1938012413, now seen corresponding path program 39 times [2020-10-27 20:14:51,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:51,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827288739] [2020-10-27 20:14:51,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:51,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:51,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:56,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:56,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-27 20:14:56,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:56,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-10-27 20:14:56,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:56,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 20:14:56,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-27 20:14:56,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 20:14:56,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:57,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:57,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:57,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:57,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:57,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:57,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:57,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:57,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:57,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:57,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:57,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:57,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2020-10-27 20:14:57,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827288739] [2020-10-27 20:14:57,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:57,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 20:14:57,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116707606] [2020-10-27 20:14:57,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 20:14:57,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:57,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 20:14:57,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:14:57,692 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 43 states. [2020-10-27 20:14:58,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:58,293 INFO L93 Difference]: Finished difference Result 267 states and 270 transitions. [2020-10-27 20:14:58,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 20:14:58,294 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 172 [2020-10-27 20:14:58,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:58,295 INFO L225 Difference]: With dead ends: 267 [2020-10-27 20:14:58,295 INFO L226 Difference]: Without dead ends: 179 [2020-10-27 20:14:58,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:14:58,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-27 20:14:58,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2020-10-27 20:14:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-27 20:14:58,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2020-10-27 20:14:58,302 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 172 [2020-10-27 20:14:58,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:58,303 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2020-10-27 20:14:58,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 20:14:58,303 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2020-10-27 20:14:58,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-27 20:14:58,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:58,304 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:58,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 20:14:58,304 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:58,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:58,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1177668735, now seen corresponding path program 40 times [2020-10-27 20:14:58,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:58,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095698080] [2020-10-27 20:14:58,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:58,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:03,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:03,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-27 20:15:03,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:03,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5424 [2020-10-27 20:15:03,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:03,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 20:15:03,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:03,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 20:15:03,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:05,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:05,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:05,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:05,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:05,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:05,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:15:05,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:05,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:05,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:05,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:05,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2020-10-27 20:15:05,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095698080] [2020-10-27 20:15:05,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:05,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 20:15:05,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582237729] [2020-10-27 20:15:05,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 20:15:05,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:05,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 20:15:05,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 20:15:05,068 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 44 states. [2020-10-27 20:15:05,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:05,683 INFO L93 Difference]: Finished difference Result 273 states and 276 transitions. [2020-10-27 20:15:05,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 20:15:05,683 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 176 [2020-10-27 20:15:05,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:05,684 INFO L225 Difference]: With dead ends: 273 [2020-10-27 20:15:05,684 INFO L226 Difference]: Without dead ends: 183 [2020-10-27 20:15:05,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 20:15:05,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-27 20:15:05,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2020-10-27 20:15:05,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-27 20:15:05,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2020-10-27 20:15:05,692 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 176 [2020-10-27 20:15:05,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:05,692 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2020-10-27 20:15:05,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 20:15:05,692 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2020-10-27 20:15:05,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-27 20:15:05,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:05,693 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:05,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 20:15:05,694 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:05,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:05,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1777804283, now seen corresponding path program 41 times [2020-10-27 20:15:05,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:05,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510800640] [2020-10-27 20:15:05,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:05,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:05,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:10,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:10,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-27 20:15:10,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:10,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5236 [2020-10-27 20:15:10,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:10,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 20:15:10,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:10,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 20:15:10,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:12,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:12,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:12,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:12,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:12,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:12,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:15:12,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:12,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:12,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:12,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:12,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2020-10-27 20:15:12,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510800640] [2020-10-27 20:15:12,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:12,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 20:15:12,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816779937] [2020-10-27 20:15:12,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 20:15:12,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:12,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 20:15:12,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:15:12,367 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 45 states. [2020-10-27 20:15:12,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:12,950 INFO L93 Difference]: Finished difference Result 279 states and 282 transitions. [2020-10-27 20:15:12,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 20:15:12,951 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 180 [2020-10-27 20:15:12,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:12,952 INFO L225 Difference]: With dead ends: 279 [2020-10-27 20:15:12,952 INFO L226 Difference]: Without dead ends: 187 [2020-10-27 20:15:12,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:15:12,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-27 20:15:12,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2020-10-27 20:15:12,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-27 20:15:12,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2020-10-27 20:15:12,962 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 180 [2020-10-27 20:15:12,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:12,963 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2020-10-27 20:15:12,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 20:15:12,963 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2020-10-27 20:15:12,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-27 20:15:12,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:12,964 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:12,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 20:15:12,964 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:12,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:12,965 INFO L82 PathProgramCache]: Analyzing trace with hash -563563895, now seen corresponding path program 42 times [2020-10-27 20:15:12,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:12,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645630172] [2020-10-27 20:15:12,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:13,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking...